#include<algorithm>
#include<list>
#include<iostream>
#include<string>
using namespace std;

void elimDup(list<string> &words)
{
    words.sort();
    words.unique();
}

bool isShorter(const string &s1,const string &s2)
{
    return s1.size()<s2.size();
}
int main()
{
    list<string> v2={"aaa","aaaaa","dfdaaaa","fdaa","aaa","dfaaaaa","aaaaa"};
    elimDup(v2);
    for(auto vv:v2)
        cout<<vv<<" ";
    cout<<endl;
    return 0;
}